摘要
在淮河源生态功能区通过设置样地调查马尾松(Pinus massoniana Lamb.)群落结构特征、林分蓄积量和单位面积林木数,分析该群落的种类组成、物种的丰富度和多样性。结果表明,1马尾松林长势一般,林木密度高,成材率不高,样地内灌木层较为丰富,草本层植物相对较少,马尾松群系在该区发育可形成多个群丛;2马尾松林单位面积林木数平均为1 988株/hm2,蓄积量平均为119.97 m3/hm2,单位面积林木数和蓄积量的相关性不显著;3马尾松群落中灌木层植物的丰富度最高,其次为草本层,最后是乔木层;多样性指数Simpson指数和Shannon-Weiner指数均为灌木层最高,其次为草本层,最后是乔木层,说明淮河源生态功能区马尾松群落的物种多样性顺序为灌木层>草本层>乔木层。4调查区的马尾松林为不成熟的群落,还处于某个演替阶段。
Pinus massoniana Lamb. community sample plots were set in Huai River source area. The community structure characteristics, stand volume and number of P. massoniana were investigated to analyze the community species composition, species richness and diversity. The results showed that, ①masson pines grew normally;trees were with high-density, while the yield was not high;in the sample area,shrub was relatively abundant; and herb was relatively less; P. massoniana formed into many associations in this area; ②the average number of tree was 1 988 ind./hm^2;the average cumulation volume was 119.97 m^3/hm^2; there was no significant correlation between the plant number and cumulation volume; ③richness of shrub species was the highest in P. massoniana community, followed by herb layer, and the tree layer; the diversity index, Simpson index and Shannon-Weiner index was the highest of shrub layer, followed by the herb layer, and the tree layer, illustrating that the order of species diversity of P. massoniana community in the Huaihe river source area was shrub layer 〉 herb layer 〉 tree layer.④ pines in the area were not mature community,still in the stage of succession.
出处
《湖北农业科学》
2015年第10期2420-2422,2427,共4页
Hubei Agricultural Sciences
基金
信阳市林业科学研究项目(00059594)
